diff --git a/data/refdata/exchange_instruments.cfg b/data/refdata/exchange_instruments.cfg
index 5778d51..fd742e8 100644
--- a/data/refdata/exchange_instruments.cfg
+++ b/data/refdata/exchange_instruments.cfg
@@ -271,6 +271,7 @@
     }
     , "COINBASE-FUT": {
         "instruments": {
+            "__DUMMY__": {}
             , "PERP-ADA-USDC": {
                 "md_symbol": "ADA-PERP-INTX",
                 "trade_symbol": "ADA-PERP-INTX"